On the cwll phone plan I have, I have to dial 10 numbers area code + the 7 digit # of the person called.
As cellphones have their own "area" code here, the same sort of thing applies, where you have to dial the full area code plus number, a total of 11 digits.
Still, where overlays have been introduced in the U.S. some people have to dial the full area code plus number even for local calls now.
The keypads on many of the latest cellphones (and other phones for that matter) aren't my idea of well designed.